The following section describes the JForex Indicator API which allows developing custom indicators.<br/><br/>In order to create a custom indicator <b>IIndicator interface</b> must be implemented. The detailed description of this interface is provided in the <a href="#IIndicator_interface">IIndicator interface</a> section.<br/><br/>Section <i>Object Description</i> deals with custom indicator description as well as indicator input and output description issues.<br/><br/>The <a href="#Simple_Indicator">Simple Indicator</a> section provides a custom indicator development tutorial.<br/><br/>Section <i>Practices</i> provides solutions for drawing graphics on chart.<br/><br/>The <i>Examples</i> section provides a range of useful practical examples of various indicators.